Table 1.

Mean Squared Error and Bias of the Estimates of the Interaction Effect^a

θge	Case-Control Method		Case-Only Method		Bayes Model Averaging Method
	MSE	Bias	MSE	Bias	MSE	Bias
0	0.023	0.003	0.012	0.004	0.015	0.003
0.1	0.021	0.001	0.020	0.100	0.018	0.037
0.2	0.023	0.002	0.049	0.195	0.027	0.039
0.3	0.020	0.001	0.099	0.297	0.027	0.026
0.4	0.023	0.001	0.169	0.398	0.026	0.009
0.5	0.020	0.003	0.261	0.501	0.020	0.004

Abbreviation: MSE, mean squared error.

^aThe odds ratio for the interaction effect was 1.0. The prior weight in the Bayes model averaging approach was set to W = 1:1, with a sample size of 2,000 cases and 2,000 controls in the simulation.